I feel like a horrible fan because as I was watching the All Night video I was thinking... it's time for them to split up and just do the solo thing. Which sucks cause I was really pumped for this comeback. But I definitely get that "has-beens" vibe, especially when I realized they're the only group left from what I considered the "big" groups when I got into Kpop (Wonder Girls, Kara, 2NE1 being the others). Twice really is the SNSD of the current era.
And things just haven't been the same without Jessica imo.

I liked "Holiday" better actually but I was watching at 5 am half asleep so my judgment might be different haha.

I don't think they'll ever really disband, maybe just taper off and sort of not acknowledge the group's status. They're just a quick cash grab for the company at this point, they've acknowledged they basically almost never see each other anymore.

I've long been of the opinion that the time was about right for SNSD to disband, and PR weasel words to the contrary notwithstanding, it is hard to see this event as anything other than disbandment in all but name. However, I wish they could have gone out with a bang befitting of their accomplishments, like a farewell concert or something, rather than just abruptly stopping due to contract expiry.

I'll probably continue to check out Taeyeon's music, but otherwise, it feels rather liberating that I don't have to pay attention to K-pop anymore.